Well-casing hanger.



mvENTol w. M. KEUR. WELL GASING HANGER. APPLICATION I'I-LED OCT. 8,193.2. l

PatentedfJn. 28, 191,3.

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T@ SAMUEL EtLLEN GUIBERSON, JR., OF COALINGA, CALEFORN.

WELL-CASNG HANGER.

Specification of Letters Patent.

application med october s, i912. senat no. 724,587.

M. Knott, a residing at Coalinga, in the county of Fresno and State ifo'boring apparatus,

proved hanger tor different thicknesses tor use -side collars 8 securedto said lugs. fhanger-bars 7 extend upward a distance,

ot' California, have invented certain new and useful improvements inlNell-Casing Hang ers, of which the following is a specification.

My invention relates, in general, to welland, in particular7 to hangersfor suspending the casing-pipe, and lowering it as the hole is made bythe drilling tools.

My invention consists in the novel iniwellcasings, which shallhereinafter, together with its objects and use, fully describe byreference to the `aocompanying drawings in which- 1 is a perspectiveview, broken, of well-cas1ng hanger. Fig. 2 1s Fig. 3 is a Figure myimproved a section of the clarnp-blockplan ot the same.

1 is the casing-pipe, pended with its upper the well.

2 is a clamp of that i'orni known in the artJ as-a spider. It comprisesa block with a central downwardly tapered hole, and a set or series oftoothed dogs 3 termed slips. The hole in the spider-block is suticientlylarge for casing-pipes of largest diameter, and the sets of slips aremade of witli different sized pipes, The engagement ot' the spider withthe casing-pipe is eli'ected in the usual manner, namely by fitting thespider-block over the pipe and dropping the slips in an.-

here shown as susend exposed above lnular series into the tapering holeot the toothed faces of the spider block, with the rlhe casing-pipe mayslips against the pipe. thus be firmly gripped about and upon its plainsurface at any poi tl below and inde.-

pendent of the couplingcollar Il on its upblock 2 is iorm'ed wrth erend. ,The spider side lugs 5. Overthese lugs are freely litted theslotted lower ends 6 of hanger-bars 7, said ends being held on the lugsby o utl'lthe say, in practice, about thirty-live feet., and their upperends are fitted vit-h across head 9-upon which is the link 10 which is'engaged by the link 1 1 in the baseof the casing-block 12. y

13 indicates the drilling cable or llne which goes down into-fthe casingpipe vand drilling` tools carries the drilling tools on its lower end.'1l are satety-cliains hooked at their up 'er ends over the collar 4f andadjustably linled at their lower ends through eye bolts 15. in thespider-block. These insure against any possible relative slipping of thespider and. block. Sufficient is now illustrated to understand myimproved hanger. More illustration is therefore unnecessary and wouldmerely confuse. Those skilled in th-e art will know that thecasing-block 12 is suspended bv lines which lead up over pulleys in thvecrown block of the derrick and thence down to the calf-wheel or drum, bythe proper manipulation of which the easingpipe is lowered as the holeis made. Also thatI the drilling cable or line passes up over the crow-nblock pulley and down to the bull- 'heel drum which provides for payingout and controlling saidline, and that said line is further equippedwith the usual temperscrew, a device which adjustably clamps the line atsuccessive points and provides for its descent in lsuccessive stages,and finally. that said temper-screw l isenga-ged and operated by theusual walking beam by which the successive lift and drop of the drillingtools are e' usual parts of a drillingl outfit, and as 'htrve stated arenot necessary to be shown for a clear understanding of my improvement.

In well drilling the casing-:pipe is suspended by means which providefor; its periodic lowering as the hole is made by the which aresuspended and op erated by the drilling line 13 passing dowr through thecasing-pipe l. means for suspending the casing pipe 1s. by a devicetermed in the art. an elevator This invariably han lected. All thesesite.

The customary the pipe by engage-- 'rarement aan. es, tais.

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mentunder its coupling collar 4.' Such engagement is found in practiceto entail the following drsadvantageous result lt so holds'said collar,

section ot' casing-pipe is screwed down into that when the succecdingthe collar, said collar will not give or turn on its pipe toniake asurer and tighter joint The collar is seldom initially .so titted to itspipe that, under the increased leverage o screwing in the. nextpipesection, it will n ot turn down tighter. This eXtra turning is ofadvantage in insuring a tight joint. But, it will be seen, any clampingdevice such as elevator which directly engages thef ,ros

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collar and thereby holds it from further turning down is not good. IThisdifficulty is obviated by the .employment of a clamp which .does notengage the collar, but directly engages the pipe below the collar,Ithereby leaving' the collar free to make its additional turn or turns.Such a clamping device is found Ain the spider Q, as I have shown. But.this is not the whole problem. Any suspending device for the casing'pipemust be one which will permit at some point a relative movement betweensaid device and the pipe. The pipe is apt to sticl; iu the hole fromtime to time, so that. it has to besuccessively lit'tedand lowered alittle. If it finds a sticking point somewhat more obdurate than usual`so that it comes to a. dead'stop when being lowered either in its`regulart'eed or during an attempt to workl it down by lifting anddropping', it is obvious that when brought to such stop, the eiilectupon thehanging parts` the weight ot' which is considerable,1 will be toimpose upon'them a compression strain which `they are not arranged tobear, and the colisequence Iis that they will slack up or buckle7 andthe casing block will turn over. fith the usual device or "elevator,above menioned, as a clamping device under,the col- Iliar, thisdiliculty is met by the fact that )said elevator itselt` .simply slipsdown on the pipe and thus compensates for the lost motion. But with arigidly-clamping device, such 'as the spider which my inventioncontemplates using, there can be no slippage between it Mand the pipe7Jand such slippage must be found elsewhere. Accordingly, I provide forthisby the slotted ends G ot the hanger-bars T which are slidablyconnected with the spider block Q. These slots are of a lengthsuflicient to enable the operator to ibody, said clamp having 'rigidlyclamp Arigidly clamp the block see in ample time that the casing isstuck in l the hole and that the slotted hanger-bars 7 are stillslipping down, and to stop them by proper use of the controllingmechanism. In brief, I am thus enabled to use ,a clamp which isindependent of the collar on the casing-pipe, and still provide for thenecessaryrelative slippage of parts, and herein lies my invention.

I claim l. A well-casing hanger comprising a clamp rigidly engaging thecasing-pipe body; hanger-bars and a sliding connection between said barsand clamp.

2. A well-casing hanger comprising a clamp` rigidly engaging thecasing-pipe side-lugs: and hanger-bars having slotted lower en'dsslidably engaging the side lugs of the clamp.I

'3. A well-casing hanger 'comprising a clamp consisting ofla blockprovided with a downwardly tapering hole to surround the casing-pipe,and dogs vitted'in said hole to `the block to the pipe: hangerbars and asliding connection between said bars and the block ofthe clamp.

4. A well-casing `hanger lcomprising a clamp consisting' of a blockprovided with a downwardly tapering hole to surround Athe casing-pipe,a'nd dogs fitted in said hole to i to the pipe, said block havingside'lugs; having slotted lower ends slidably engaging the side-lugs ofthe block.. i

In testimony whereof I have signed my name to this specification in thepresence ot two subscribing witnesses.

VILLIAM M. KECK. VitneSSes:

M. MANXING CLARK.' H. R. Cnozn-zn.

and hanger-bars

